Removal of Heavy Metal Ions from Industrial Waste Water Using Metallic Nanoparticles as Adsorbents

Vyawahare, S. K.; Pradhan, Saswat Kumar; Gupta, Suresh

doi:10.1166/asl.2014.5568

Cited by 3 publications

(3 citation statements)

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“…One of the most studied methods to prevent corrosion and protect aluminum consists in the use of inorganic and/or organic coatings that can modify its corrosion potential and its electric resistance. Inorganic coatings usually are based on chromium, cerium, and other metallic ions, but they are usually avoided because of their limited lifetime and negative environmental impact. , …”

Section: Introductionmentioning

confidence: 99%

“…Inorganic coatings usually are based on chromium, 21 cerium, 22 metallic ions, 23 but they are usually avoided because of their limited lifetime and negative environmental impact. 24,25 On the other hand, organic coatings have been proven to provide excellent protection to aluminum in different aqueous media and their characteristics have been recently reviewed in the literature. 26 Amines, N-heterocyclic compounds, azole, imidazole, and thiazole derivatives, different kinds of polymers, organic dyes, and Schiff bases have demonstrated their potential in this field.…”

Section: ■ Introductionmentioning

confidence: 99%

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Lignin-Based Anticorrosion Coatings for the Protection of Aluminum Surfaces

Haro

Magagnin

Turri

et al. 2019

ACS Sustainable Chem. Eng.

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New renewable lignin-based coatings with anticorrosion properties are presented in this work. These materials are based on the silanization of a tetrahydrofuran (THF) soluble fraction of a technical softwood kraft lignin through urethane linkages and its subsequent thermal cross-linking on metallic substrates using different cross-linking promoters. Spectroscopy analyses confirmed silanization of lignin meanwhile the thermal analyses indicated an increase of the glass transition temperature and the thermal stability after the functionalization process. The silanized (LF-S) and nonsilanized (LF) lignins were used as main materials for the preparation of thermally cross-linked coatings in the presence of different promoters, namely tetraethyl orthosilicate (TEOS) as a cocrosslinker and/or acetic acid (AcH) as a catalyst. The coatings prepared from LF-S presented improved thermal stability and hydrophobic character compared with those obtained from unmodified LF. Moreover, the adhesion strength of the coatings on aluminum increased when the cross-linker promoters were incorporated to the coating formulation. Finally, the corrosion inhibition effect of these coatings was assessed through the evaluation of the corrosion current density on aluminum, finding important improvements on the electrochemical stability of the metal. The results of this study clearly demonstrate a straightforward approach for the production of high-lignin-content coatings that may find direct industrial application in the field of corrosion prevention for metals.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Lignin-Based Anticorrosion Coatings for the Protection of Aluminum Surfaces

Haro

Magagnin

Turri

et al. 2019

ACS Sustainable Chem. Eng.

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“…The development of high affinity adsorbents for Presently, the application of nanosized adsorbents has emerged as a fast-developing, fascinating area of interest for removal of dyes from industrial effluents because of unique characteristics of nanomaterials such as large surface area, a greater number of active sites, and low diffusion resistance for adsorbates, which results in high adsorption capacity and reactivity to pollutants. [15,16] Nanosized hydroxyapatite (nHAP, Ca 10 (PO 4 ) 6 (OH) 2 ) has recently attracted considerable attention as an ideal amendment for the remediation of contaminated soil, water and sediment, given the distinct crystal structure and unique physicochemical properties of nHAP. [17] The effective removal of direct yellow 27, [18] reactive blue 204, [19] and methylene blue [20] by nHAP have been reported in the literature.…”

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confidence: 99%

Surface-bound humic acid increased rhodamine B adsorption on nanosized hydroxyapatite

Wang

et al. 2016

Journal of Dispersion Science and Technology

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In this study, humic acid-bound nanosized hydroxyapatite (HA-nHAP) was developed as a novel adsorbent, and the potential of using HA-nHAP for the adsorption of Rhodamine B (RhB) from aqueous solution as functions of pH, adsorbent dosage, contact time, ionic strength and temperature was investigated. The results indicated that the HA binding significantly increased the adsorption of RhB due to the introduction of abundant negatively charged functional groups. The adsorption capacity of HA-nHAP for RhB was found to be pH-dependent, and the optimal pH value was found to be 6.0. The adsorption equilibrium data obeyed Sips and Freundlich isotherms and the kinetic data were well described by the Elovich kinetic model. According to the Sips equation, the maximum adsorption capacity for RhB was 24.12 mg/g. Temperature and ionic strength experiment Downloaded by [University of Sussex Library] at 15:15 18 May 2016 2showed that they both had effect on the adsorption capacity of HA-nHAP. Thermodynamic study confirmed that the adsorption was a spontaneous, endothermic and more random arrangement process. The present investigation showed that HA-nHAP is a promising adsorbent for the removal of RhB from aqueous solution.

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Synthesis and characterization of nanocomposites containing Buchholzia coriacea pod decorated with multi-walled carbon nanotubes for remediation of rhodamine B dye from aqueous solution

Amaku,

Taziwa

2023

Appl Water Sci

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A novel nanocomposite (WKM) was synthesized by crosslinking Buchholzia coriacea pod (WK) and f-MWCNTs for the efficient adsorption of rhodamine B (RhB) from wastewater. The uptake of RhB onto WK and WKM was influenced by initial pH, adsorbent dose, the temperature of the adsorptive system, contact time and initial RhB concentration. Optimum experimental conditions of 100 min agitation time, 0.05 g dosage, solution pH 3.0 and 100 mg dm−3 initial concentration were obtained. The uptake of RhB onto WK and WKM was well expressed by Freundlich isotherm and a monolayer maximum uptake capacity of 67.82 mg g−1 and 87.58 mg g−1 was determined for WK and WKM, respectively. The adsorption of RhB onto WKM and WK followed the Elovich and pseudo-first-order kinetic models, respectively. Thermodynamic parameters such as ∆G°, ∆H° and ∆S° reveal that the uptake of RhB onto WK and WKM was spontaneous and endothermic. Meanwhile, WKM demonstrated excellent reusability. Hence, this study presents a nanocomposite (WKM) with robust potential for RhB removal.

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Removal of Heavy Metal Ions from Industrial Waste Water Using Metallic Nanoparticles as Adsorbents

Cited by 3 publications

References 0 publications

Lignin-Based Anticorrosion Coatings for the Protection of Aluminum Surfaces

Lignin-Based Anticorrosion Coatings for the Protection of Aluminum Surfaces

Surface-bound humic acid increased rhodamine B adsorption on nanosized hydroxyapatite

Synthesis and characterization of nanocomposites containing Buchholzia coriacea pod decorated with multi-walled carbon nanotubes for remediation of rhodamine B dye from aqueous solution

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